Question

$P$ is the centre of the square $B_p=?$Four $L$ shaped wires, each carrying current $I$ Find the magnetic field at point $P$ ?

• A. $1wb/m^2$
• B. $0wb/m^2$
• C. $2wb/m^2$
• D. $noneofthese$

Answer 1

The correct option is C $2wb/m^2$

Given P is the centre of square

$B_p=?$

Four L shaped wires carrying current$=I$

$B_p=\frac{I}{L/2}{B}_p=\frac{2I}{L}{B}_p=2\times B$

And at the point P, the magnetic field$=2wb/m^2$